Axxel

Hi.

Im looking for shorter connecting rods for my -97 C36 AMG, to lower the compression ratio.

Anyone knows if it"s possible to find on the market ?

Or maby someone is sitting on some more detailed information about the engine, so i can calculate the right lenght my self. Looking to go 9.0-1 comp ratio

Brgs Axel

Jons95c36amg

Why would you want to ruin a nice handbuilt engine?

CFLPEEK

i'm not to sure why you are wanting to do this. that probably isnt the best idea, but here is all the info you need. if you end up doing anything, let us know how it effects the performance of the engine.
cylinder bore is 91.0 +/- 0.015mm, diameter of cyl head gasket 92.1mm, crankshaft stroke is 92.4mm with counter weights being reworked for clearance and the oil spray nozzles were counter balanced, factory compression ratio is 10.5-1, piston diameter 90.914-90.926mm, piston length=54.9mm, connecting rod length=144mm with the piston pin end being machined to ensure piston clearance. i hope this helps. let us know the results.

ohlord

You shorten the connecting rods,you need new pistons.You would ruin the engine by not having the piston come up to the deck.quench would all but disappear and the engine would fall flat on it's face.Get a dished piston or change the cams profile to bleed off some if you need to lower it for more boost,if that is what you are after.

either way it's going to cost you big$

iolithblue

forced induction, methinks?

SeeKlasse

are you crazy? youre going to try to work on your old c36? with the 4 spd auto tranny? nice... why dont you save your money and buy a 97 c36 (which is almost as fast as the c43) if you want a good 202 amg car. no offense but having driven a '96 c280 and a '97 c280 you can REALLY tell a diff, the 5spd makes such a big difference! good luck on your turbo project let us know if you discover any interesting details along the way...

ohlord

trans was the more robust of the two.So if power to the trans is the consideration the dex3 fluid 722.424 trans would be the power handling choice over the 722.6 trans any day.Stock sure the 5 speed is great,however if he is boosting he won't need the stepped gear ratios he will want power handling.
jmtc
and if he wants to lower compression to avoid 4buck a gallon high test gas
I feel sorry for him

Axxel

Thanx for the info, getting in contact with a company when i get home that are experiensed with supercharging Merc engines, and yes, thats the idea ( Turbo )

My engine is cept in it"s original condition, found a used -96 engine from a crashed car that i will experiment with.

The gearbox (722.6) will ofcours be rebuilt to handle the extra power, this is at the moment the factor that might cancel the entire project (If to expensive) Im closing in on the milage where the gearbox need to be rebuilt anyway, due to needle bearing. It runs great at the moment, but just to be sure. Probably cheaper to rebuild a grearbox that is in good condition, then to do one thats smashed.

And why do it ? .. Why not ? Not to many boosted C36 on the road makes it even more interesting (And harder due to lack of information available) and after reading about that twin turbo built in the US, 561 HP sounds nice.. Very nice..

4$ a gallon ? ha ha.. Try 9$ a gallon, thats what we are looking at here in Sweden (Or Europe for that matter) And the way things are going it seams like you guys over there on the other side of the atlantic will sooner or later see those numbers on your signs at the pumpstation aswell.

Project is still not launched, just gathering information to see if it"s possible.
And money is not the big problem.

Again thanx for your information and ideas.

Brgs

ohlord

and a big enough intercooler and water injection on boost will allow use of the stock components.Some of the old turbo kits are still for sale if you don't want to reinvent the wheel.

anything can be done...look in the w124 section for the guy over by you that has the tube chassis full race carbon fiber project.Fine work and some would say silly to do but the fun is in the doing

Dr. C36

there is a set on ebay in australia right now for $399 AU, talk about good timing haha

CFLPEEK

the 722.3, 722.4, and 722.5 (found in the 140's and 129's with a 104 engine) do a much better job of handling power than the 722.6 does. the 722.5 was a 5 speed transmission, as the 722.3 and 722.4 were both 4 speeds.

the 95 and 96 c36's both had 722.3 transmissions. mercedes did not put the 722.4 trans in any car over 3 liters.

ProjectC55

The block in the C36 sux for F/I because the cylinder walls are too close. You will keep blowing head gaskets as a result. I've seen it! It is also difficult to O-Ring this block because of the closeness of the cylinder walls.

Try to find a block from a diesel, the cylinder walls are much much thicker and it's a better block to use if you want to go F/I.